I just installed xampp on my computer. I started Apache and MySQL, but now it is not working. I don't know what is the problem as Xampp is working, but I can't see anything on the localhost.
Check to see if 127.0.0.1 works. If that doesn't show anything either, xampp isn't working properly. However, if I remember correctly, xampp is a pain. I would suggest wamp instead.
Probably it's because you are using a different port than the 80. Can you take a screenshot of your XAMPP panel? You should see 3 columns "Module", "PID(s)" and "Port(s)", the first row should be "Apache", now look at the "Port(s)". Check which number (or numbers) you see and try to access with: localhost:<PortNumber> For example if you see "443" in "Port(s)" access it with: localhost:443 (or 127.0.0.1:443).
Yeah... that doesn't tell us anything, because it's impossible to read. Remember that a screenshot actually needs to be readable...